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Topic Review (Newest First)
03-04-2013 10:07 AM
Numbercruncher Lower gears would really help with 6th on the freeway and driving in general. I am sure you know that but just in case . . .

NC


Quote:
Originally Posted by Moha View Post
After many hours of driving the two (3.6 & 3.8) here is what I noticed:

My 2013 JK sport 6spd (Intake + Exhaust + 3.21 gears + 33" tires)

On road:

WOT, a lot faster but requires you to spin the engine, power is felt above 5000RPM.
Highway cruising in 6th gear is a PITA, there is just no power. I have to downshift to 5th and somtimes 4th just to get me going.

Offroad:

3.6 has a slight edge in the sand dunes because of the higher HP's.
3.6 tends to overheat quicker (dunes require power thus the tendancy to rev higher creates this)

Cousins 2010 JK Islander edition 6spd (Intake + Exhaust + 3.73 gears + Bully dog tune + stock tires)

On road:

WOT, slower and power tends to die up top.
Highway cruising is much better with usable power in 6th gear (may be due to 3.73's)
Feels it has more torque coming out of a stop and city driving (lower RPM's).

Offroad:

Better at keeping engine temps low.
Overall performance is very close.



I like my 3.6 better
03-03-2013 11:32 PM
Sasquatchewan can't we all just get along the 4.0 has so far proven to be the most reliable Engine yet & the 3.8 not to shaby it's self but not perfect I hope the 3.6 will be the most reliable one yet because it has the best power but it sure got a sh£#^y start on reliability only time will tell shoot if your not happy with what you have you can drop a LSX in it or a Hemi whatever
03-03-2013 03:46 PM
thinkxingu OP, for what you will be doing, I would think the "package" would be more important than the engine/tranny. For example, a 3.8 Rubicon in a color you love and with the features and price you want would be better than a 3.6 Sport in a color and price you don't love.

This is exactly why I bought my '10 JKU Islander: I think the interior is more "Jeepy," I was able to save about $3k over a Sport while getting more features (dual top/upgraded audio/Islander package/tow, etc.), and I love the color.

When it came down to it, the performance of the 3.6 over the 3.8 was not worth the other stuff.

Good luck!

S
03-03-2013 03:22 PM
WatchThis!
Quote:
Originally Posted by jkjeeper06 View Post
^^^ sounds about right
+1
03-03-2013 03:19 PM
Nuclear Cowboy As usual, a very entertaining thread. I drove both and opted for the 3.6. Both were IMO capable but once you add in the full warranty and the new car smell the 2013 seemed like the smart choice.

Best of luck to ya.
03-03-2013 02:33 PM
jkjeeper06 ^^^ sounds about right
03-03-2013 02:30 PM
Apexeater
Quote:
Originally Posted by bloodfart View Post
Seems you had your mind made up all along, just needed confirmation.
Not at all, I started this topic with the thought that I should avoid the 3.8. Now after getting some good information from people who paid attention to my stated goals and what the question really was I now have some options. Some of those options have inherent pluses and minus's, that is up to me to determine which is the better route. And you are right, it is all good.

What I have gathered from this topic is:
3.8 is a fair engine for the road but has some limitations. But for the trail it is more than capable but may need re-gearing depending on tire size.

3.6 is the stronger, faster engine, with the better tranny but has it's own problems (head issue, additional cost).
03-03-2013 12:11 PM
ohioviper I would say 90% of the folks here are using their JK as a DD. Not too many folks can afford to make a dedicated trail rig out of a new $30k Jeep.So yea the power of the 3.6 is very useful and does come in to play for most .
03-03-2013 11:30 AM
joe002 I think many (most?) Jeep owners use their Jeep as a car. They need a DD and want to use the Jeep for it - no problem. For them, things like: MPG, 0-60, 1/4 mile, looks, etc. may be the most important part of the Jeep.

Some Jeep owners got their Jeep to take it off-road. I’ve been able to buy a car for my DD and we use the Jeep to go off-road. For off-roading other things are more important: clearance, armor, gearing, suspension, etc. It also depends on the type of off-roading you do. Out here in AZ it’s typically dry and rocky, so we have our Jeep setup for crawling over rocks. If you do sand or mud then you may want/need a different setup. You obviously have to drive on a road to get to the trails, but unlike driving to work when you’re wheeling you typically go with a group and your need to use high acceleration and worry about MPG improvements is limited as you are running with a group of Jeeps not a Corvette club.
03-03-2013 11:22 AM
WatchThis!
Quote:
Originally Posted by RoadiJeff View Post

Believe it or not but a lot of Jeep owners spend MORE time driving their Jeeps ON the road than OFF. I have yet to find a 23 mile unpaved trail from my driveway to my work parking lot, 28 miles away.

I believe I'd rather have a Jeep setup for where I drive it 99% of the time.
Did you read the whole thread?
03-03-2013 11:11 AM
RoadiJeff
Quote:
Originally Posted by WatchThis! View Post
On the freeway sure it makes a difference but believe it or not lots of folks dont just drive there jeeps on the freeway.
Believe it or not but a lot of Jeep owners spend MORE time driving their Jeeps ON the road than OFF. I have yet to find a 23 mile unpaved trail from my driveway to my work parking lot, 28 miles away.

I believe I'd rather have a Jeep setup for where I drive it 99% of the time.
03-03-2013 04:11 AM
Moha After many hours of driving the two (3.6 & 3.8) here is what I noticed:

My 2013 JK sport 6spd (Intake + Exhaust + 3.21 gears + 33" tires)

On road:

WOT, a lot faster but requires you to spin the engine, power is felt above 5000RPM.
Highway cruising in 6th gear is a PITA, there is just no power. I have to downshift to 5th and somtimes 4th just to get me going.

Offroad:

3.6 has a slight edge in the sand dunes because of the higher HP's.
3.6 tends to overheat quicker (dunes require power thus the tendancy to rev higher creates this)

Cousins 2010 JK Islander edition 6spd (Intake + Exhaust + 3.73 gears + Bully dog tune + stock tires)

On road:

WOT, slower and power tends to die up top.
Highway cruising is much better with usable power in 6th gear (may be due to 3.73's)
Feels it has more torque coming out of a stop and city driving (lower RPM's).

Offroad:

Better at keeping engine temps low.
Overall performance is very close.



I like my 3.6 better
03-03-2013 12:02 AM
WatchThis!
Quote:
Originally Posted by WatchThis! View Post
Oh and bloodfart you might want to read the whole thread.... especially the parts where I said people were closed minded and thank that whatever they have is the best there is.

And being in 4 low will not give you any more power.

And being in 4 low will also not give you more torque. You only have whatever the motor puts out - drive line loss.
Oh and more power is a huge pluss in the mud. Not sure why someone who knows everything could get that one wrong.
03-02-2013 11:40 PM
SilverSport I put the 3.8 in my last Jeep through a 5 minute torture test and it passed with flying colors.
03-02-2013 11:37 PM
joe002
Quote:
Originally Posted by JPi1 View Post
Im Running 35s on my 12, and have no plans to rehear until I go 37s, then I'll go with 4.88s. The jeep drives great with the stock 4.10s
Yeah, I've read/heard that you are OK, I just haven't driven one myself.

Some said that 4.10s and 35s would be OK in my '08, but after trying it that way for a while I wasn't happy with it. After putting on the 5.38s I'm happy.
03-02-2013 11:30 PM
WatchThis! Oh and bloodfart you might want to read the whole thread.... especially the parts where I said people were closed minded and thank that whatever they have is the best there is.

And being in 4 low will not give you any more power.

And being in 4 low will also not give you more torque. You only have whatever the motor puts out - drive line loss.
03-02-2013 11:29 PM
JPi1
Quote:
Originally Posted by joe002
Yeah, some people seem to be fixated on mini vans, 1/4 mile times, 0-60, etc.

Yeah, try them out. If you’re gong to wheel it with 35s then you will need to re-gear an 07-11, but it may be hard to find a used re-geared one to test drive (unless you meet up with some that has done it already). With the automatic in 12+ you can probably get away with the stock 4.10s and 35s.

It all depends on the cash you have to spend on the entire package and the deals you can find out there.
Im Running 35s on my 12, and have no plans to rehear until I go 37s, then I'll go with 4.88s. The jeep drives great with the stock 4.10s
03-02-2013 11:21 PM
WatchThis!
Quote:
Originally Posted by bloodfart View Post

I love how some people can justify anything that they dont have as useless. I bet if your jeep only had 4HI you'd probably be in the camp that knocked on the 4LO saying it's pointless and you dont need that much power and torque on the trail. Throwing blanket statements is the worst thing you can do! Why wouldn't more power help on some trails???? Not everything is flat or muddy, sometimes you gotta climb mammoth hills and you need that power. And not everyone that wants a stronger engine is a boy racer that never sees the dirt! But hey, if power is so useless offroad, why dont you swap a neon engine in your rig, that way you can get good mileage on the trail too

Did I ever say more power was useless?

And
Ahhhh did someone get pissy? Trust me I have been up a hill or two. My jeep has only been in 4 high three times, and I know for a fact that there is way more to a rig then the motor.

But what do I know? Last month I was laying on my back at 1 in the morning puting in the third tranny in a week on a KOH rig that came in 14'th and I am laying in a hote room in College Sration Tx after a dirt riot race that the same rig came in Second. And guess what this rig only puts 285hp to the ground. There are a whole lot more rigs that make way more power out there coming in behind it.


I guess I am a damed fool because I am fixing to build a lightweight 4.8 rig over the next year also to run with 6.0s.


Point is, it is not all about the motor, and I never have said that having more power is a bad thing. But having more power does not make your jeep better unless you are going to drag race.


I have posted a pic or two on this forum of my rig riding around on the bunny slopes. Where are your pics?
03-02-2013 11:13 PM
joe002
Quote:
Originally Posted by Apexeater View Post
Yeah, i'm not sure how the topic of minivans keeps coming up. Still there has been some great info on here.

I will have to drive one to see how it goes. I think it may work for what i want.
Yeah, some people seem to be fixated on mini vans, 1/4 mile times, 0-60, etc.

Yeah, try them out. If you’re gong to wheel it with 35s then you will need to re-gear an 07-11, but it may be hard to find a used re-geared one to test drive (unless you meet up with some that has done it already). With the automatic in 12+ you can probably get away with the stock 4.10s and 35s.

It all depends on the cash you have to spend on the entire package and the deals you can find out there.
03-02-2013 10:53 PM
bloodfart
Quote:
Originally Posted by Apexeater View Post

Yeah, i'm not sure how the topic of minivans keeps coming up. Still there has been some great info on here.

I will have to drive one to see how it goes. I think it may work for what i want.
Seems you had your mind made up all along, just needed confirmation. As long as you're happy, that's all that matters. Everyone is going to take a different route, but eventually we end up in roughly the same spot, so it's all good as long as you have fun
03-02-2013 10:50 PM
bloodfart
Quote:
Originally Posted by joe002 View Post
It seems in this forum wheelers are in the minority...
How do you know??? I'm out almost every single weekend, but you have no way of knowing that just by reading my posts.
03-02-2013 10:48 PM
Apexeater
Quote:
Originally Posted by joe002 View Post
It appears that he is sifting out the car comments and focusing and the Jeep comments.
Yeah, i'm not sure how the topic of minivans keeps coming up. Still there has been some great info on here.

I will have to drive one to see how it goes. I think it may work for what i want.
03-02-2013 10:45 PM
bloodfart
Quote:
Originally Posted by WatchThis! View Post

So I am guessing you have a 3.6 (on my phone so I cant look at your profile) I have a 3.8 but am not a diehard fan of it. But since the numbers are so insignificant you should be able to beat any 3.8 on any track right.

Since I cant see your profile and have no clue what you drive I am going to ask you if you live close to Texas and are willing to prove that all that power makes a difference when it comes to wheeling?

On the freeway sure it makes a difference but believe it or not lots of folks dont just drive there jeeps on the freeway.
I love how some people can justify anything that they dont have as useless. I bet if your jeep only had 4HI you'd probably be in the camp that knocked on the 4LO saying it's pointless and you dont need that much power and torque on the trail. Throwing blanket statements is the worst thing you can do! Why wouldn't more power help on some trails???? Not everything is flat or muddy, sometimes you gotta climb mammoth hills and you need that power. And not everyone that wants a stronger engine is a boy racer that never sees the dirt! But hey, if power is so useless offroad, why dont you swap a neon engine in your rig, that way you can get good mileage on the trail too
03-02-2013 09:42 PM
JeffC
Quote:
Originally Posted by joe002 View Post
It seems in this forum wheelers are in the minority...
I never see these threads on ANY of the other forums ... and the wheeling done by those members is no joke.

WF is my first and favorite, but ...... such topics. I'd rather read about re-gearing than drag racing a cube.
03-02-2013 09:20 PM
JPi1 Even though I have both engines, I will never get rid of my 08. I think the 3.8 engines are built better to last longer. Roller cam, flat top Teflon coated pistons, 4 bolts mains.
03-02-2013 09:07 PM
joe002
Quote:
Originally Posted by WatchThis! View Post
Very good point. Especially in the last year. I tend to forget that sometimes
Yeah, it really did pick up last year. There are many car threads and posts as it appears that for many the car features are the most import thing about their Jeep.

I try to only post when the OP wants to wheel it, and the OP said it's not going to be a DD, so I added my comments. It appears that he is sifting out the car comments and focusing and the Jeep comments.
03-02-2013 09:07 PM
WatchThis! My hole point is that people tend to post in threads like this because they think they have the best, and are not going to let on that they might be wrong. I know my jeep was under powered when I bought it, but I worked around it and am happy enough with the outcome. That dosent mean that my jeep might get a lot more HP after a while. But you can bet your butt I wont be braging about my 0 to 60 times.
03-02-2013 08:59 PM
WatchThis!
Quote:
Originally Posted by joe002 View Post
It seems in this forum wheelers are in the minority...
Very good point. Especially in the last year. I tend to forget that sometimes
03-02-2013 08:54 PM
joe002
Quote:
Originally Posted by WatchThis! View Post
...On the freeway sure it makes a difference but believe it or not lots of folks dont just drive there jeeps on the freeway.
It seems in this forum wheelers are in the minority...
03-02-2013 08:52 PM
WatchThis!
Quote:
Originally Posted by RoadiJeff View Post
I summed it up in another thread but the 3.6L has 42.5% more hp than the 3.8 and 46% quicker in 0-60. The 3.8L diehards can try and brush that off as insignificant but even Motor Trend says it's a noticeable improvement in performance.
So I am guessing you have a 3.6 (on my phone so I cant look at your profile) I have a 3.8 but am not a diehard fan of it. But since the numbers are so insignificant you should be able to beat any 3.8 on any track right.


Since I cant see your profile and have no clue what you drive I am going to ask you if you live close to Texas and are willing to prove that all that power makes a difference when it comes to wheeling?


On the freeway sure it makes a difference but believe it or not lots of folks dont just drive there jeeps on the freeway.
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